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Oval MAG- III Series Instructions Manual

Electromagnetic flowmeter
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C
102
1
E
−
−
−
Ins. No.
Electromagnetic flowmeter
Models MGW and MGS
Every MAG-OVAL III is manufactured under the stringent quality control and thoroughly tested and
inspected before shipment from our factory.
This manual is designed to assist the user to obtain the best performance of this product throughout
its service life. In order to take sufficient care, please read this instruction carefully before the use
and keep it handy for quick reference.
1

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Summary of Contents for Oval MAG-OVAL III Series

  • Page 1 Electromagnetic flowmeter Models MGW and MGS Every MAG-OVAL III is manufactured under the stringent quality control and thoroughly tested and inspected before shipment from our factory. This manual is designed to assist the user to obtain the best performance of this product throughout its service life.

  • Page 2: Table Of Contents

    C−102-1-E CONTENTS 1. GENERAL ..........................4 2. BEFORE YOU BEGIN ......................5 3. PIPING INSTRUCTIONS .....................6 3.1 Straight Pipe Section ............................. 6 3.2 Keeping the Flow Tube Completely Filled ..................... 6 3.3 Physical Orientation of the Probe ........................7 3.4 Bypass Line ..............................7 3.5 Prevention of Negative Pressure ........................
  • Page 3 C−102-1-E 13. ANALOG OUTPUT FUNCTION ..................36 13.1 Setting Analog Output ..........................36 13.2 Analog Output at Error/Alarm ........................36 13.3 Adjusting Analog Output ..........................37 14. PULSE OUTPUT AND TOTALIZING FUNCTION ............38 14.1 Setting Pulse Output ..........................38 14.2 Pulse Output at Error/Alarm ........................39 15.

  • Page 4: General

    C−102-1-E 1. GENERAL Electromagnetic flowmeters operate on the basis of Faraday's law of electromagnetic induction. When a conductive liquid flows through the magnetic field applied perpendicular to the direction of flow, an electromotive force (EMF) is induced proportionally to the average velocity of flow according to Faraday's law. A pair of electrodes located on the flow tube wall picks up the induced EMF which is then amplified in the transmitter to determine the volumetric flow rate.

  • Page 5: Before You Begin

    FLOW RANGE ⑤ PULSE  OUTPUT ⑫ MAX. PRESS ⑥ CAL.  ZERO ⑬ MAX. TEMP ⑦ CAL.  FACTOR ⑭ OVAL Corporation MADE IN JAPAN Side view from Arrow A Item Description (1) Product code Ex. MGW1-0501T17E-10A 　　　—— (2) Product No. (3) Instrument No. As designated (4) Fluid measured Ex. Water (5) Flow range Ex.

  • Page 6: Piping Instructions

    C−102-1-E 3. PIPING INSTRUCTIONS 3.1 Straight Pipe Section (1) Provide at least 5D (D: nominal pipe diameter) of straight piping upstream of the meter. For screw-in type meters (3 to 15 mm in nominal diameter), no straight piping is required because of their long face-to-face dimension with respect to their diameter.

  • Page 7: Physical Orientation Of The Probe

    C−102-1-E 3.3 Physical Orientation of the Probe The probe may be installed in any physical orientation as long as the flow tube is completely filled with the process fluid. Keep in mind the following precautions, however. (1) Horizontal run In a horizontal line, keep electrodes axes on a level plane to minimize the risk of electrodes being insulated momentarily due to suspended gas bubbles.

  • Page 8: Prevention Of Negative Pressure

    C−102-1-E 3.5 Prevention of Negative Pressure In order to maintain a long-term service life of the probe, take positive measures to eliminate Negative press. relief valve Upstream valve circumstances that can create negative pressure Probe Downstream valve in the pipeline. Flow (1) If both upstream and downstream valves remain closed with fluid temperature higher...

  • Page 9: Wafer Type (Nominal Sizes 25 To 150Mm)

    C−102-1-E (2) Union and other joints should be of dedicated accessories furnished for connecting pipes. Use of nonstandard fittings can lead to unexpected trouble. Tightening nut Rc (PT) screw adapter Gasket Union fitting Fig. 4.2 Example of Unions Installed in Place Fig.

  • Page 10: Transmitter Installation

    * Pipe is not supplied with the flowmeter. Mounting to a horizontal pipe 2″ Pipe Adapter Sec A-A 181.6 Installation on a horizontal pipe is shown with dotted lines. Mounting to a vertical pipe Fig. 4.6 MAG-OVAL III Transmitter Hold-down Hardware...
  • Page 11 C−102-1-E (2) Procedure to tilt the LCD display to the desired angle: The display unit in its housing is rotatable in increments of 90 degrees through 360 degrees. By changing the LCD display orientation, you can achieve optimum viewability also in a vertical line. CAUTION: Do not forget to turn off the power before beginning this procedure.

  • Page 12: Grounding

    C−102-1-E 5. GROUNDING The electromotive force detected across electrodes of the probe is a very weak voltage measured against the reference potential of metered liquid. Accordingly, earth grounding (better than Class C grounding) is essential to maintain the probe and metered liquid at the same potential. Illustrated below are the proper grounding procedures. Grounded metal pipeline Ungrounded metal pipeline Plastic or lined pipeline...

  • Page 13: Wiring Connection Diagram

    C−102-1-E 6.2 Wiring Connection Diagram GND terminal location　　　　　　　　　　　　Details of terminal block Power terminal (TB1) screw size: M4 Internal ground terminal Power fuse Output signal terminal (TB2) screwless terminal External ground terminal Fig. 6.4 Connecting Terminal Layout 6.3 Power and Output Signal Terminal Identification Item Terminal No.

  • Page 14: Wiring Connection Instruction

    C−102-1-E 6.4 Wiring Connection Instruction The screw size for cable entry is G1/2. For connections to terminals, use the following crimping terminals. Terminal name Recommended crimping terminal Power terminal Round crimping terminal for M4 No crimping terminal is required. Output signal terminal Use a cable of 0.2 to 1.25mm (Screwless terminal block) Standard wire strip length: 11mm...

  • Page 15: Start-Up

    LCD display menus. 8. MAINTENANCE Every MAG-OVAL III leaves the factory under stringent quality control. As long as it is placed under proper conditions, it will perform satisfactorily over long periods of time. If trouble arises, diagnose the nature of trouble according to the troubleshooting chart below for the possible solution.

  • Page 16: Transmitter Display And Operation

    C−102-1-E 9. TRANSMITTER DISPLAY AND OPERATION 9.1 Explanation of Display (1) Instant flow rate display (5) Error/Alarm indicator (Top row) (2) Instant flow rate unit (3) Total flow display (4) Total flow rate unit (Bottom row) display (6) [ENT] key indicator (8) [SEL] key indicator (7) [ENT] key (9) [SEL] key...

  • Page 17: Key Operations

    C−102-1-E 9.2.2 Key Operations The keys of this flowmeter can be operated by placing the supplied magnet close to the "SEL" key and "ENT" key in the magnet switch section. Moving the magnet close to the SEL key or ENT key causes the magnet sensor to respond and the key entry is set to ON.

  • Page 18: Measure Mode

    C−102-1-E 10. MEASURE MODE 10.1 Measure Mode Screen After power on or at the completion of Setup mode in item 11, the flowmeter enters Measure mode and the following screen will appear on the display of the flowmeter. The upper row indicator shows instant flow rate. This display allows instant flow rate, % flow rate, and flow velocity to be changed by the key operation.

  • Page 19: Error/Alarm And Status Display

    C−102-1-E 10.3 Error/Alarm and Status Display Error, alarm, and status report are notified by the LCD indicator. At the occurrence of error, [ERR] indicator turns on at the upper left of the LCD. At the occurrence of alarm, [ALM] indicator turns on at the upper left of the LCD. The LCD top row indicates error/alarm occurred, status number and measurement value alternately.

  • Page 20: Screen Change For Instant And Total Flow Indication

    C−102-1-E 10.4 Screen Change for Instant and Total Flow Indication In the Measure mode, the descriptions shown on the top row indicator and bottom row indicator can be switched interchangeably. To change the description to be displayed, set the top row or bottom row to the focused state (blinking) by using the "ENT"...

  • Page 21: Operations In Setup Mode

    The password feature is "Invalid" and default password is "0000" in the setting at the factory shipment. If you wish to validate the password feature, carefully manage your password. (If you forget your password, contact nearest OVAL office or service center.) Measure mode/Setup mode switching operation In case password setting is effective Press and...

  • Page 22: Menu Operation In Setup Mode

    C−102-1-E 11.2 Menu Operation in Setup Mode Transition of item in the Setup mode is available by "SEL" and "Press and hold ENT". "Layer code" indicating the set item is displayed for 2 seconds for each item. For the details of setting items, refer to "12. DISPLAY TRANSITION". The display items are switched by "SEL", and transition to the lower layer is carried out by "Press and hold ENT".

  • Page 23: Changing Parameters

    C−102-1-E 11.3 Changing Parameters Changing parameters is executed by the following operations. When selecting a setting item, the current content is displayed on the bottom row indicator. "Press and hold ENT" enables transition to parameter Edit mode. CAUTION: To prevent accidental erroneous operation by parameter changing, this procedure shall be carried out while the flow is stopped.

  • Page 24: Setting Numeric Parameters (Ex. Changing Flow Range Setting)

    C−102-1-E 11.3.2 Setting Numeric Parameters (Ex. Changing flow range setting) When entering the Edit mode, the top-most digit of numeral is focused (blinking). Change the value of the blinking digit focused by "SEL" and shift the focused digit to the right by pressing "ENT".

  • Page 25: Viewing Exponential Indication

    C−102-1-E 11.3.3 Viewing Exponential Indication Exponential indication is a notation of effective digit X exponent (10 to the nth power). For example, to set "123.45", 1.2345 X 10 is given. Therefore, enter 1.2345E2. (10 = 100) Setting negative exponent is also available. For example, to set "0.012345", 1.2345 X 10 is given in exponential indication.

  • Page 26: Display Transition

    C−102-1-E 12. DISPLAY TRANSITION 12.1 Display Transition (1) Setting Display "SEL" Parameter name Parameter "Press and hold SEL" display symbol Layer code (Major item ― Secondary item ― Third item) "Press and hold ENT" Other [Top row display] Selects display [Bottom row display] Displays total flow ** .
  • Page 27 C−102-1-E Description of item Display of optionally resettable total flow Operation: Reset this display by "press and hold ENT" while resettable total is blinking. Content of parameter Default Setting range " " Allows selecting valid/invalid of password feature. Selecting causes On (Valid), OFF (Invalid) password entry to be required before entering the Setup menu screen, preventing the parameter from being changed easily.

  • Page 28: Display Transition (2) Setting Flow Parameter

    C−102-1-E 12.2 Display Transition (2) Setting Flow Parameter "SEL" Parameter name Parameter "Press and hold SEL" display symbol Layer code (Major item ― Secondary item ― Third item) "Press and hold ENT" Other [Top row display] Selects display [Bottom row display] Displays total flow ** .
  • Page 29 C−102-1-E Content of parameter Default Setting range 0.5 to 10m/s Can change the full scale of % flow rate (max. measured flow). specified by flow velocity conversion Can change damping time constant for flow measurement. Affects the instant flow rate display and analog output. 0.50     ...

  • Page 30: Display Transition (3) Setting Output Signal

    C−102-1-E 12.3 Display Transition (3) Setting Output Signal "SEL" Parameter name Parameter "Press and hold SEL" display symbol Layer code (Major item ― Secondary item ― Third item) "Press and hold ENT" Other [Top row display] Selects display [Bottom row display] Displays total flow ** .
  • Page 31 C−102-1-E Content of parameter Default Setting range Can change the analog output lower limit flow (flow at 4mA output). 0 to Measurement range setting 0.0000E0      When you change the measurement range, change this parameter as necessary. * Flow (5 significant digits + 1 exponent digit) * Unit is subject to the setting of instant flow rate display unit.

  • Page 32: Display Transition (4) Setting Error And Alarm Output

    C−102-1-E 12.4 Display Transition (4) Setting Error and Alarm Output "SEL" Parameter name Parameter "Press and hold SEL" display symbol Layer code (Major item ― Secondary item ― Third item) "Press and hold ENT" Other [Top row display] Selects display [Bottom row display] Displays total flow ** .
  • Page 33 C−102-1-E Content of parameter Default Setting range Outputs when flow exceeds the preset measurement range. On (Valid), OFF (Invalid) Outputs when there is an abnormal error in the flowmeter hardware. On (Valid), OFF (Invalid) On (Valid), OFF (Invalid) Outputs when parameter setting is inappropriate. On (Valid), OFF (Invalid) Outputs when analog or pulse output exceeds the preset higher or lower limit.

  • Page 34: Display Transition (5) Setting Diagnosis And Maintenance Functions

    C−102-1-E 12.5 Display Transition (5) Setting Diagnosis and Maintenance Functions "SEL" Parameter name Parameter "Press and hold SEL" display symbol Layer code (Major item ― Secondary item ― Third item) "Press and hold ENT" Other [Top row display] Selects display [Bottom row display] Displays total flow ** .
  • Page 35 Set the parameter so that instruments with duplicated address are not present. (2 integer digits) In the case of 1 to 1 connection, leave the parameter at "0". Lights all segments of LCD. ― ― Mode dedicated to OVAL service personnel Not disclosed ―...

  • Page 36: Analog Output Function

    C−102-1-E 13. ANALOG OUTPUT FUNCTION This flowmeter is equipped with analog output function to meet 4-20mA current loop and is able to provide an output by converting the instant flow rate to analog signal. It can provide analog output in the desired range with respect to the preset measurement range. The load resistance of the analog output is 510Ω...

  • Page 37: Adjusting Analog Output

    C−102-1-E 13.3 Adjusting Analog Output The current of analog output has been adjusted at the time of factory shipment. If, however, any error is present in the output value and measurement value depending on your service environment, adjustment of the current of analog output is available.

  • Page 38: Pulse Output And Totalizing Function

    C−102-1-E 14. PULSE OUTPUT AND TOTALIZING FUNCTION This flowmeter is equipped with pulse output function. It can output factored pulse to which weight per pulse is added in advance or pulse with a frequency proportional to the flow rate. Frequency pulse is an open drain pulse in the range of 0.01 to 11kHz or 18V voltage pulse (depending on delivery specifications).

  • Page 39: Pulse Output At Error/Alarm

    C−102-1-E Factored pulse mode In this method, flow rate per pulse is specified. This mode is used when pulse output is entered to the total counter, etc. The output frequency is determined by the following formula (when instant flow rate unit is L/min and total flow unit is L).

  • Page 40: Status Output Function

    C−102-1-E 15. STATUS OUTPUT FUNCTION This flowmeter has a status output function that can output error/alarm and status information. Status output is open collector output. 15.1 Selecting Status Output ■ Allocating status output Sets the function allocated for status output. Setting is selectable from no allocation, error/alarm output, high-low alarm output, or flow direction.

  • Page 41: Loop Test (Simulative Output) Function

    C−102-1-E 16. LOOP TEST (SIMULATIVE OUTPUT) FUNCTION With this function, simulative output of analog, pulse and status is carried out for verifying the connection between this flowmeter and external instruments. The loop test is operated from the "LP.tSt" submenu under the Setup mode.

  • Page 42: Communication Function

    In addition, changing, saving, etc. of parameters locally or remotely is available by the use of dedicated communication software "LinkTop for MAG-OVAL" to be purchased separately. For the handling of the communication software, refer to the instruction manual of "LinkTop for MAG-OVAL".

  • Page 43: Setting Communication Functions

    C−102-1-E 17.2 Setting Communication Functions Setting of communication functions is carried out in the CHECK submenu under the Setup menu. ■ Setting baud rate Baud rate is set from "bAud.r" of the CHECK submenu under the Setup menu. It can be selected from 9600bps, 19200bps, or 38400bps.

  • Page 44: Self-Diagnosis Function

    C−102-1-E 18. SELF-DIAGNOSIS FUNCTION This flowmeter is equipped with self-diagnosis function. Use this function for early detection of abnormality, troubleshooting, etc. Flow measurement can continue even during self-diagnosis operation. Diagnosis can be executed periodically even normal measurement is in operation. This function reports an error or alarm if any abnormality is found. Self-diagnosis can be operated automatically or manually from the Setup menu.

  • Page 45: Diagnosing All Items

    C−102-1-E 18.2 Diagnosing All Items This function executes self-diagnosis of all four items and displays the results. This function is activated by self-check function "CHECK" of the Setup mode (layer code 14-00). Self-diagnosis menu Press and Started by "Press and hold ENT". hold ENT The screen during self-diagnosis.

  • Page 46: Diagnosing Self-Diagnosis Items Individually

    "Press and hold SEL" restores original screen. If no abnormality is found, "Good" is displayed. If abnormality is found, "FAiL" is displayed. If any abnormality is present, please inform OVAL of the abnormal item with the measurement value for quick study of cause and countermeasure.

  • Page 47: Error/Alarm Status List

    C−102-1-E...

  • Page 48: Other Statuses

    C−102-1-E 20.2 Other Statuses About measurement and output in individual status Display status (*) Output operation Measurement Status Instant flow Analog status Total flow Pulse output Status output rate output Normal Normal Simulating In analog simulating output totalizing measurement Depends on output operation output...

  • Page 49: Parameter List

    C−102-1-E 21. PARAMETER LIST Reference/setting on display Layer code of Major item Item on parameter sheet Parameter name display Default Reference to Setting change transition table setting Tag number Descriptor Descriptor Message Message Date Date of manufacture Device ID Device ID Sensor serial No.

  • Page 50: General Specifications

    C−102-1-E 22. GENERAL SPECIFICATIONS Item Description Nominal size (mm) 3, 6, 10, 15 25, 40, 50, 80, 100 Connection Screw-in type (G male thread) Wafer type (Sandwich design for installation between flanges) Applicable liquids Liquids (water, industrial water, slurries, chemical liquids, solutions) * Only conductive liquids Flow range See the table on the next page.

  • Page 51: Flow Range

    C−102-1-E 23. FLOW RANGE ● Flow range and nominal size selection ● Flow velocity, flow rate, nominal size selector nomograph Flow range can be selected between 0 to 0.5m/s and 0 to 10m/s, common to all nominal sizes. Determine the nominal size that best suits your application using the flow velocity, flow rate, and nominal size selector nomograph.

  • Page 52: Product Code Explanation

    ○ ○ Version NOTES: *1: For nominal size 150mm, earth ring (SUS316) is attached between the joint face and the flange instead of earth electrode. *2: Special product is also available with Bell 202 communication. If you prefer, contact OVAL.

  • Page 53: Outline Dimensions

    C−102-1-E 25. OUTLINE DIMENSIONS All dimensions in millimeters ● Nom. sizes 3 to 15mm (screw type) ● Nom. sizes 25 to 150mm (water type) Transmitter Transmitter Selector GND terminal Selector magnet magnet GND terminal (M5) (M5) Cable entries G 1/2 Cable entries G 1/2 G male Adapter Adapter...
  • Page 54 C−102-1-E 2016.06 Revised 2014.04 Released All specifications are subject to change without notice for improvement. C-102-1-E (2)

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